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Extruded seal

a technology of extrusion and seal, applied in the direction of gravity filter, separation process, filtration separation, etc., can solve the problems of no longer fulfilling the required sealing task, absorbing moisture and forming deposits on the seal, etc., to achieve high sealing effect, shorten production time, and high strength

Active Publication Date: 2010-11-23
MANN HUMMEL GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a seal element for a filter element that is made using an extrusion method. The seal element is made of a polymer material that forms a strong bond with the fibrous filter medium, resulting in high strength and a high sealing effect simultaneously. The extrusion method also shortens the production time and improves the cost-effectiveness of the filter element manufacturing. The seal element can be bonded to the filter medium using a nonwoven strip, a foam, or an adhesive force. The seal element has outstanding rubber-elastic properties and can stabilize the filter medium. The extrusion method allows for the use of multiple layers and the possibility of integrating components into the seal element. The seal element can be designed as lip-like or continuously over corners of the filter element. The surface of the seal element can be equipped with the ability to slide or printed to identify the product.

Problems solved by technology

One disadvantage of such foam seals is that these seals may absorb moisture and deposits may form on the seals.
Furthermore, such glued-on seals may be sheared off during installation into the complex filter housing provided for this purpose and thus no longer fulfill the required sealing tasks.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0023]FIG. 1 shows a filter medium 10 which is supplied in the form of a web to two embossing rollers 11, 12. Crease edges are embossed into the filter medium in this area, the filter medium is subsequently erected to form a filter element folded in a zigzag shape, which is guided between two toothed belts 13, 14 and approaches extrusion heads 15 situated on both sides of the filter web. A glue bead is applied to both front faces of the filter medium after the embossing using a glue application head 16, which results in laterally sealed gluing of the folds upon the subsequent folding. Seal strands, which cool directly after the application and unfold their elastic properties, are applied to both sides of the filter web in the upper edge area of the filter web using the extrusion heads 15.

[0024]The next method step is an isolation of the filter elements, for this purpose a cutting device 17 is provided, which cuts the filter elements 18, 19 to the required length during the cutting p...

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Abstract

A filter element, including a filter medium, on which a seal is situated indirectly or directly, which is used for separating the filter intake side from the filter discharge side. The filter medium comprises a fibrous material. The seal is applied indirectly or directly to the filter medium in the extrusion method (FIG. 1).

Description

[0001]The present invention relates to a filter element comprising a filter medium with a seal situated thereon and a method for producing such filter elements.BACKGROUND OF THE INVENTION[0002]In the automobile industry in particular, filter elements are used for the intake air of the internal combustion engine and / or for filtering the air supplied to the interior. Such filter elements have PUR polyester or PUR polyether foam seals for the seal between the unfiltered air side and the filtered air side. One disadvantage of such foam seals is that these seals may absorb moisture and deposits may form on the seals. Furthermore, such glued-on seals may be sheared off during installation into the complex filter housing provided for this purpose and thus no longer fulfill the required sealing tasks.[0003]A filter element is known from DE-OS 26 20 148, for example, which is constructed from corrugated paper filter webs and is enclosed on its lateral front faces using lateral strips, which ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B01D46/00
CPCB01D46/0001B01D46/10B01D46/521B01D2271/02B01D2279/60
Inventor WALZ, STEFAN
Owner MANN HUMMEL GMBH
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